The computer was used in teaching.As a result，not only ________，but students became more interested in the lessons.
| A．saved was teachers' energy |
| B．was teachers' energy saved |
| C．teachers' energy was saved |
| D．was saved teachers' energy |
The hero of the story is an artist in his_________ .
| A．thirtieth | B．thirty | C．thirty’s | D．thirties |
The Yellow River is_________river in China.
| A．the second long | B．the second longest |
| C．the two long | D．the two longest |
—What do you think of the book?
—Oh，excellent.It’s well worth _________time.
| A．reading a second | B．reading the second |
| C．to read a second | D．to read the second |
She began to play table tennis_________，and became famous_________ .
| A．in the 1970’s;in her twenties | B．in 1970s;in her twenties |
| C．in the 1970s;in her twenty | D．in the 1970s;in the twenty |
—How about the walls?
—The walls are_________ thick.
| A．three-inch | B．three inches |
| C．three-inches | D．three inch |